Tube bundle type turbulent ball dust removal device and flue gas dust removal system

Abstract

The utility model provides a tube bundle type turbulent ball dust removal device and a flue gas dust removal system, which belong to the field of flue gas dust removal and comprise an upper flushing mechanism, a lower flushing mechanism and a dust removal mechanism. And the upper and lower flushing mechanisms respectively spray dust removal liquid downwards and upwards through flushing ports which are horizontally arranged at intervals to form two-way flushing. The dust removal mechanism comprises a plurality of horizontally distributed turbulent ball units, each unit is composed of an outer containing cylinder and an inner containing cylinder which are coaxially arranged in a sleeved mode, turbulent balls are filled between the cylinders, intercepting grids are arranged at the two ends, and a rotational flow fan is arranged at the bottom to drive flue gas to spirally ascend. The outer containing cylinder and the inner containing cylinder are of at least two layers of axial overlapping structures, when the rotational flow fan rotates, turbulent balls move and collide among the cylinders, and efficient polymerization of smoke dust and liquid drops is achieved by combining upper and lower flushing liquid flows, so that the technical problems that existing dust removal equipment is overall heavy, large in occupied space and high in maintenance and construction cost are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of flue gas dust removal, more specifically, relates to a pipe bundle type turbulent ball dust removal device, and the utility model further relates to a flue gas dust removal system. BACKGROUND

[0002] The pipe bundle type dust remover is a mist and dust removal equipment, and is applied to removal and purification of mist droplets and dust carried by saturated clean flue gas of a wet desulfurization tower.

[0003] Generally, the pipe bundle type dust remover mainly relies on the characteristics that a large number of fine mist droplets are contained in low-temperature saturated clean flue gas at the upper part of the absorption tower, utilizes the condition that the fine mist droplets move at a high speed to increase the collision probability of fly ash particles and the mist droplets, and realizes capture and removal of the extremely fine fly ash dust and the mist droplets through coagulation of the fly ash particles and the mist droplets. The working principle of the pipe bundle type dust remover can be simply expressed as follows: through three motion states of coagulation, capture and annihilation of the fly ash particles and the mist droplets, the mist droplets and the dust particles carried in the flue gas are separated in the process of high-speed rotation, intense mixing and rotational motion of the flue gas. Coagulation refers to the fact that a large number of fine mist droplets and particles greatly increase the collision probability under the condition of high-speed motion, and are easily coagulated and gathered to become large particles, so as to realize separation from the gas phase. In terms of structure, the pipe bundle type dust remover is composed of a pipe bundle body and a multi-stage speed increaser, a separator, a flow collecting ring and a flow guiding ring.

[0004] According to different flue gas and dust removal effect requirements, different speed increasers, separators and flow collecting rings can be selected for multi-stage combination. First, the relatively large mist droplets and particles in the flue gas are removed through a first-stage separator, and then the mist droplets and particles with a smaller particle size are removed through a second-stage separator after the flue gas is accelerated by the speed increaser. Meanwhile, the flow collecting ring is used to control the liquid film thickness of the inner wall of each stage, so as to ensure that no secondary mist droplets with a smaller size are generated under the condition of high speed.

[0005] However, the existing pipe bundle type flue gas dust removal device has the problems of complex and heavy structure (such as including a speed increaser, a separator, a flow collecting ring and the like), large space occupation in the dust removal equipment, and high overall maintenance and construction costs, which need to be improved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a pipe bundle type turbulent ball dust removal device to solve the technical problems of high overall maintenance and construction costs and large space occupation of the existing dust removal equipment.

[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a pipe bundle type turbulent ball dust removal device, which comprises:

[0008] The upper flushing mechanism comprises an upper flushing pipeline, which has a plurality of first flushing openings arranged along a first horizontal direction, and the first flushing openings spray dust removal liquid downward;

[0009] The lower flushing mechanism comprises a lower flushing pipeline, which has a plurality of second flushing openings arranged along a first horizontal direction, and the second flushing openings spray dust removal liquid upward;

[0010] The dust removal mechanism comprises a plurality of dust removal units arranged along the first horizontal direction, and each of the dust removal units is arranged in a dust removal pipe bundle of a dust removal tower, and the dust removal unit comprises an outer containing cylinder, an inner containing cylinder, a turbulent ball and a cyclone fan, the outer containing cylinder is arranged in the dust removal pipe bundle and coaxially sleeved on the outer periphery of the inner containing cylinder, a containing space is formed between the outer containing cylinder and the inner containing cylinder, the number of the turbulent balls is a plurality, each of the turbulent balls is filled in the containing space, the upper and lower ends of the outer containing cylinder and the inner containing cylinder are both provided with a grid for intercepting the turbulent balls, the cyclone fan is arranged at the bottom of the outer containing cylinder and coaxial with the outer containing cylinder, the cyclone fan can drive flue gas to flow upward between the inner containing cylinder and the outer containing cylinder, and the outer containing cylinder and the inner containing cylinder are arranged as at least two along the axial direction and overlap each other, with the rotation of the cyclone fan, the turbulent balls move in the containing space and collide with each other, and collect dust and dust removal liquid.

[0011] In a possible implementation, the bottom end of each of the outer containing cylinders is provided with the cyclone fan.

[0012] In a possible implementation, the dust removal mechanism further comprises a support frame, and the outer containing cylinder, the inner containing cylinder and the cyclone fan are all mounted on the support frame.

[0013] In a possible implementation, each of the first flushing openings corresponds to the top end of each of the dust removal pipe bundles, and each of the second flushing openings corresponds to the bottom end of each of the dust removal pipe bundles.

[0014] In a possible implementation, the turbulent ball is a polyhedral structure similar to a spherical shape.

[0015] In a possible implementation, the outer periphery of the turbulent ball is formed with a plurality of recesses, and each of the recesses is uniformly arranged on the outer periphery of the turbulent ball.

[0016] In a possible implementation, the filling height of each of the turbulent balls in the containing space is not less than 5 times the radius of the turbulent ball.

[0017] Compared with the prior art, the pipe bundle type turbulent ball dust removal device has the following advantages:

[0018] Firstly, the water flow and spray of the up and down flushing mechanism can liquefy the flue dust in the pipe bundle, so as to preliminarily remove the flue dust, and then under the action of the cyclone fan, the water droplets containing the flue dust move along the containing space and adhere to the outer circumferential surface of the turbulent ball, the turbulent balls collide with each other in the process of moving up and down, so that the water droplets adhering to the outer circumferential surface of the turbulent ball fall off and flow along the axial direction of the pipe bundle to the corresponding mobile mechanism, thereby completing the dust removal operation of the flue dust; compared with the prior art, the number of structures required for the dust removal process is greatly reduced, the space occupation of the dust removal equipment in the entire dust removal system is reduced, and the up and down flushing mechanism and the dust removal mechanism are easy to maintain and replace, solving the technical problems of the existing dust removal equipment, such as overall bulkiness, excessive space occupation and high maintenance cost.

[0019] In addition, the overlapping arrangement of the double cyclone fans forms a spiral upward reinforced turbulent flow field in the multi-layer containing cylinder, which can also improve the movement speed of the turbulent ball, increase the collision frequency of the turbulent ball, and further improve the capture efficiency of the turbulent ball on the liquid droplets of the contaminated liquid, solving the technical bottleneck of insufficient dust removal under high flow conditions. The support frame provided in the utility model is conducive to realizing the quick disassembly and maintenance of the outer containing cylinder and the cyclone fan, the maintenance time is shortened from 8 hours of the traditional welding structure to 2 hours, the axial positioning accuracy is controlled within ±0.5mm, the stability of the turbulent ball movement track is ensured, and the fluctuation range of the dust removal efficiency is narrowed from ±3% to ±0.7%.

[0020] In addition to the above beneficial effects, each flushing port in the utility model can be accurately aligned with each pipe bundle to form complete coverage of each flue gas passing pipe bundle, thereby improving the utilization rate of the flushing liquid.

[0021] In addition, the utility model also can pass through polyhedral turbulent ball (at least 32 polyhedron) and surface micro concave design (groove depth 0.1mm), thereby improving the surface area of the turbulent ball, improving the liquid film adhesion amount on the surface of the turbulent ball, improving the capture efficiency of the dust removal mechanism on the flue dust, not only that, the turbulent ball in the embodiment has a plurality of collision edges, which can improve the collision frequency of the turbulent ball and the angular momentum of the turbulent ball after collision, and reduce the scaling period of the surface of the turbulent ball. Furthermore, by controlling the filling height of the turbulent ball, the utility model can form a stable turbulent ball collision space, prolong the residence time of the flue gas flowing through the containing space, and thus improve the dust removal effect on the flue gas.

[0022] Another purpose of the utility model is to provide a flue gas dust removal system, which comprises the pipe bundle type turbulent ball dust removal device mentioned above.

[0023] Compared with the prior art, the flue gas dust removal system in the utility model has all the beneficial effects of the pipe bundle type turbulent ball dust removal device mentioned above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings. In the drawings:

[0025] Fig. 1 The overall structure schematic diagram of the pipe bundle type turbulent ball dust removal device provided by the present application is shown in the figure.

[0026] Fig. 2 The structure schematic diagram of one of the turbulent balls in the pipe bundle type turbulent ball dust removal device provided by the present application is shown in the figure.

[0027] Fig. 3 The structure schematic diagram of another of the turbulent balls in the pipe bundle type turbulent ball dust removal device provided by the present application is shown in the figure.

[0028] Fig. 4 The structure schematic diagram of the cyclone fan in the pipe bundle type turbulent ball dust removal device provided by the present application is shown in the figure.

[0029] In the figure:

[0030] 1, upper flushing mechanism; 11, upper flushing pipeline; 111, first flushing port;

[0031] 2, lower flushing mechanism; 21, lower flushing pipeline; 211, second flushing port;

[0032] 3, dust removal mechanism; 31, dust removal unit; 311, outer containing cylinder; 312, inner containing cylinder; 313, turbulent ball; 314, cyclone fan; 32, support frame. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "back" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application in that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation.

[0035] Further, in the description of the present application, unless otherwise explicitly defined, the terms "mounting", "connecting", "connection", "connector" should be interpreted broadly. For example, the connection can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate media, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0036] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0037] Please refer to Figs. 1 to 4 , the pipe bundle type turbulent ball dust removal device provided by the present application will be described. The pipe bundle type turbulent ball dust removal device comprises an upper flushing mechanism 1, a lower flushing mechanism 2 and a dust removal pipeline, wherein the upper flushing mechanism 1 comprises an upper flushing pipeline 11, the upper flushing pipeline 11 has a plurality of first flushing openings 111 arranged along a first horizontal direction at intervals, and the first flushing openings 111 spray dust removal liquid downward; the lower flushing mechanism 2 comprises a lower flushing pipeline 21, the lower flushing pipeline 21 has a plurality of second flushing openings 211 arranged along the first horizontal direction at intervals, and the second flushing openings 211 spray dust removal liquid upward; the dust removal mechanism 3 comprises a dust removal unit 31 arranged between the upper flushing mechanism 1 and the lower flushing mechanism 2, the dust removal unit 31 is a plurality of units arranged along the first horizontal direction, and each dust removal unit 31 is arranged in a dust removal pipe bundle of a dust removal tower, the dust removal unit 31 comprises an outer containing cylinder 311, an inner containing cylinder 312, a turbulent ball 313 and a cyclone fan 314, the outer containing cylinder 311 is arranged in the dust removal pipe bundle and coaxially sleeved on the outer periphery of the inner containing cylinder 312, a containing space is formed between the outer containing cylinder 311 and the inner containing cylinder 312, the number of the turbulent balls 313 is a plurality, each turbulent ball 313 is filled in the containing space, the upper and lower ends of the outer containing cylinder 311 and the inner containing cylinder 312 are both provided with a grid for intercepting the turbulent balls 313, the cyclone fan 314 is arranged at the bottom of the outer containing cylinder 311, and the cyclone fan 314 is coaxial with the outer containing cylinder 311, the cyclone fan 314 can drive flue gas to flow upward between the inner containing cylinder 312 and the outer containing cylinder 311, the outer containing cylinder 311 and the inner containing cylinder 312 are both arranged as at least two along the axial direction of the self-overlapping arrangement, with the rotation of the cyclone fan 314, the turbulent balls 313 move in the containing space and collide with each other, and collect flue dust and dust removal liquid.

[0038] Compared with the prior art, in the specific implementation process of the embodiment, the water flow and spray of the up-and-down flushing mechanism 2 can liquefy the flue dust in the dust removal pipe bundle to preliminarily remove the dust from the flue gas. Then, under the action of the cyclone fan 314, the water droplets containing the flue dust move along the containing space and adhere to the outer circumferential surface of the turbulent ball 313. The turbulent balls 313 collide with each other during the up-and-down movement, so that the water droplets adhering to the outer circumferential surface of the turbulent ball 313 fall off and flow along the axial direction of the pipe bundle to the corresponding mobile mechanism, thereby completing the dust removal operation of the flue dust. Compared with the prior art, the number of structures required for this dust removal process is greatly reduced, the space occupation of the dust removal equipment in the entire dust removal system is reduced, and the up-and-down flushing mechanism 2 and the dust removal mechanism 3 are easy to maintain and replace, thereby solving the technical problems of the existing dust removal equipment, such as being heavy, occupying too much space, and having high maintenance and construction costs.

[0039] Based on the above embodiment, in a more preferred embodiment, the bottom end of each outer containing cylinder 311 is provided with a cyclone fan 314. In order to install the above structure, the dust removal mechanism 3 further includes a support frame 32, and the outer containing cylinder 311, the inner containing cylinder 312 and the cyclone fan 314 are all installed on the support frame 32. In this way, the embodiment can form a spiral upward enhanced turbulent flow field in the multi-layer containing cylinder by the overlapping arrangement of the double cyclone fans 314, and can also improve the movement speed of the turbulent ball 313, increase the collision frequency of the turbulent ball 313, and further improve the capture efficiency of the turbulent ball 313 for the liquid droplets of the contaminated liquid, thereby solving the technical bottleneck of insufficient dust removal under high flow conditions. As for the support frame 32 set forth above, it is beneficial to realize the quick disassembly and assembly of the outer containing cylinder 311 and the cyclone fan 314. The maintenance time is shortened from 8 hours of the traditional welding structure to 2 hours, the axial positioning accuracy is controlled within ±0.5 mm, the stability of the movement track of the turbulent ball 313 is ensured, and the fluctuation range of the dust removal efficiency is narrowed from ±3% to ±0.7%.

[0040] In addition to the above feasible embodiments, in order to improve the utilization rate of the flushing liquid, in some embodiments, each first flushing port 111 corresponds to the top end of each dust removal pipe bundle one by one, and each second flushing port 211 corresponds to the bottom end of each dust removal pipe bundle one by one. The flushing ports arranged corresponding to each pipe bundle form complete coverage of each flue gas conveying pipe bundle, thereby improving the utilization rate of the flushing liquid.

[0041] In a possible implementation, the turbulent ball 313 is a polyhedral structure similar to a sphere. Similarly, in an alternative implementation, the outer circumferential surface of the turbulent ball 313 is formed with a plurality of recesses, and each recess is uniformly arranged on the outer circumferential surface of the turbulent ball 313. In this way, the above-mentioned embodiment can improve the surface area of the polyhedral turbulent ball 313 (at least 32 polyhedrons) and the surface micro-recess design (recess depth 0.1 mm) to improve the liquid film adhesion amount on the surface of the turbulent ball 313, thereby facilitating the improvement of the capture efficiency of the dust removal mechanism 3 on the flue dust. Moreover, the turbulent ball 313 in the embodiment has a plurality of collision edges, which can improve the collision frequency of the turbulent ball 313 and the angular momentum of the turbulent ball 313 after collision, and reduce the scaling period of the surface of the turbulent ball 313.

[0042] In a possible implementation, the filling height of each turbulent ball 313 in the containing space is not less than 5 times the radius of the turbulent ball 313, so as to form a stable turbulent ball 313 collision space by controlling the filling height of the turbulent ball 313, prolong the residence time of the flue gas flowing through the containing space, and thereby improve the dust removal effect on the flue gas.

[0043] In summary, the utility model realizes three-dimensional dust removal through the synergistic effect of the up and down flushing mechanisms 2 and the turbulent ball 313 unit. The up flushing pipeline 11 sprays downward through the first flushing port 111 arranged at intervals to form a liquid film to intercept coarse particles, and the down flushing pipeline 21 sprays upward through the second flushing port 211 to form a countercurrent adsorption of fine dust. Combined with the turbulent flow field driven by the cyclone fan 314, the dust-containing liquid drops are efficiently captured in the double-layer sleeve type turbulent ball 313 unit. The turbulent ball 313 unit adopts a coaxial nested structure of the outer containing cylinder 311 and the inner containing cylinder 312, and the polyhedral turbulent ball 313 (at least 32 polyhedrons) is filled between the cylinders. The surface micro-recess design (recess depth 0.1 mm) significantly improves the specific surface area compared with a spherical body, and the liquid film adhesion amount is significantly improved. The collision edge structure increases the collision frequency of the turbulent ball 313 by 1.8 times, thereby facilitating the improvement of the flue dust particle removal rate. The axial overlapping arrangement of the double cyclone fans 314 forms a spiral upward turbulent flow field, so that the residence time of the flue gas is prolonged to 1.2 seconds, and the filling height of the turbulent ball 313 is ≥5 times the diameter of the turbulent ball 313 (Φ25 mm ball filling ≥125 mm), so that the outlet dust concentration is stably controlled at 5 mg / Nm 3 The modular support frame 32 design shortens the maintenance time from the traditional 8 hours to 2 hours, the axial positioning accuracy ±0.5 mm ensures that the dust removal efficiency fluctuation range is ≤±0.7%, the flushing port and the dust removal pipe bundle are accurately aligned (deviation ≤2 mm) to form a full-coverage three-dimensional network, the flushing liquid utilization rate is improved to 92%, the land occupation area of the whole device is reduced by 40%, the annual operation cost is saved by 1.2 million yuan / set, and it is especially suitable for the modification of active units with limited space. The utility model successfully solves the problems of high humidity flue gas adhesion and blockage, insufficient dust removal under high flow conditions, and high maintenance cost of traditional equipment.

[0044] Based on the same inventive concept, the utility model still provides a flue gas dust removal system, the flue gas dust removal system includes the pipe bundle formula turbulent ball dust removal device in the above.

[0045] Compared with the prior art, the flue gas dust removal system in the utility model has all the advantages of the pipe bundle formula turbulent ball dust removal device described above, which will not be repeated here.

[0046] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A pipe bundle turbulent ball dust collector characterized by, The application relates to a pipe bundle type turbulent ball dust removal device. The upper flushing mechanism comprises an upper flushing pipeline, which is provided with a plurality of first flushing openings arranged along a first horizontal direction and used for spraying dust removal liquid downward. The lower flushing mechanism comprises a lower flushing pipeline, which is provided with a plurality of second flushing openings arranged along the first horizontal direction and used for spraying dust removal liquid upward. The dust removal mechanism comprises a plurality of dust removal units arranged along the first horizontal direction and arranged in dust removal pipe bundles of a dust removal tower.

2. The turbulent ball dust collector of claim 1, wherein The dust removal units are provided with an outer containing cylinder, an inner containing cylinder, a plurality of turbulent balls and a cyclone fan.

3. The turbulent ball dust collector of claim 2, wherein The outer containing cylinder is coaxially sleeved on the outer periphery of the inner containing cylinder.

4. The turbulent ball dust collector of claim 3, wherein The outer containing cylinder and the inner containing cylinder are provided with gratings at upper and lower ends thereof for intercepting the turbulent balls.

5. The turbulent ball dust collector of claim 1, wherein The cyclone fan is arranged at the bottom of the outer containing cylinder and is coaxial with the outer containing cylinder.

6. The turbulent ball dust collector of claim 1, wherein The cyclone fan can drive flue gas to flow upward into the space between the inner containing cylinder and the outer containing cylinder.

7. The turbulent ball dust collector of claim 1, wherein The outer containing cylinder and the inner containing cylinder are arranged in an axially overlapping manner.

8. A flue gas dedusting system characterized by, With rotation of the cyclone fan, the turbulent balls move in the space and collide with each other, and collect dust and dust removal liquid. The bottom end of each of the outer containing cylinders is provided with the cyclone fan. The dust removal mechanism further comprises a support frame, and the outer containing cylinder, the inner containing cylinder and the cyclone fan are mounted on the support frame. Each of the first flushing openings corresponds to the top end of each of the dust removal pipe bundles, and each of the second flushing openings corresponds to the bottom end of each of the dust removal pipe bundles. The turbulent ball is a polyhedral structure similar to a spherical shape. The outer periphery of the turbulent ball is formed with a plurality of recesses. The filling height of each of the turbulent balls in the space is not less than 5 times the radius of the turbulent ball. The application further relates to a pipe bundle type turbulent ball dust removal device.

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